Area Book Planner is a free Android application developed by The Church of Jesus Christ of Latter-day Saints for full-time missionaries. The app allows them to set goals, make plans, and record progress of the people they serve. It is designed to work closely with local unit leaders and members, find and contact interested people, keep track of appointments and other activities, and navigate their area to plan their time effectively.

The user interface is simple and intuitive, allowing missionaries to quickly access the information they need. The app is also highly customizable, allowing users to tailor it to their specific needs. The Area Book Planner is an essential tool for any full-time missionary, providing them with the means to be more organized, efficient, and effective in their service.